PHYSICS
JAMB 2005 - Question 22
Physics 2005 JAMB Past Questions - Question 22: a car battery rated 45H is charged with a charger whose rating is 2.5 how long will it take to charge the battery fully
Choose the correct answers from the options given.
A:
B:
C:
D:
Correct Answer
D
Explanation
For a car battery rated 45AH, being charged by a charger of 2.5A rating, the time for the battery to be fully charged is given by T = 45/2.5 = 18hrsTo calculate how long it will take to fully charge a car battery rated at 45 ampere-hours (Ah) with a charger rated at 2.5 amperes (A), you can use the formula:
Time (in hours) = Battery Capacity (in Ah) / Charger Current (in A)
Time = 45 Ah / 2.5 A
Time = 18 hours
So, it will take approximately 18 hours to fully charge the 45 Ah car battery with a 2.5 A charger, assuming ideal charging conditions and no significant loss of efficiency. In reality, it may take a bit longer due to factors like charger efficiency and the state of charge of the battery when you start charging.
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